A decrease in the rate of beating of heart is called__________?
Correct answer: A. Bradycardia
- A. Bradycardia
- B. Tachycardia
- C. Braditachycardia
- D. Non of these
Explanation
Bradycardia means an abnormally slow heart rate, commonly defined in adults as fewer than 60 beats per minute at rest. Students may choose tachycardia because it is another term ending in “cardia,” but tachycardia means an increased, not decreased, rate.
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About Cardiac Cycle and Heartbeat
The cardiac cycle describes atrial systole, ventricular systole and diastole, including pressure changes, blood movement and the opening or closing of heart valves. It also covers the conduction pathway from the sinoatrial node through the atrioventricular node, bundle of His and Purkinje fibres, and relates these events to heartbeat sounds.
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